W9425G6JH-5 - 256Mbit DDR400 SDRAM, 16Mx16, 2.5V TSOP-II | Winbond
部品番号: W9425G6JH-5 ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.1 | $41.00 |
| 100 | $3.25 | $325.00 |
| 500 | $2.75 | $1,375.00 |
| 1,000 | $2.4 | $2,400.00 |
W9425G6JH-5 概要
A DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory) is a type of volatile memory that transfers data on both the rising and falling edges of the clock, effectively doubling the peak throughput of a single-data-rate SDRAM of the same bus frequency. DDR-I sits at the base of the DDR family hierarchy (DDR -> DDR SDRAM -> volatile memory -> DRAM -> semiconductor memory) and was standardized by JEDEC as the JESD79 specification family. Compared to its predecessor SDR SDRAM, DDR-I uses a 2n-prefetch architecture, SSTL-2 I/O, and requires a 2.5V supply for VDD plus a 2.5V supply for VDDQ.
Key specifications of the W9425G6JH-5 include 4,194,304 words per bank across 4 banks, a 16-bit data bus width, a CAS Latency (CL) of 3 at DDR400, a 66-pin TSOP-II mechanical outline measuring 0.400 inch wide, and the -5I industrial temperature grade option that supports -40C to +85C. The chip operates from a single 2.5V VDD supply with a separate VDDQ rail terminated to VTT for the SSTL-2 interface. Internally, the device uses a 4-bank architecture with dual-bank operation and supports burst lengths of 2, 4, 8, and full page.
The W9425G6JH-5 is constructed with a prefetch I/O scheme synchronized to the internal SDRAM clock, achieving DDR400 compliance when paired with a host controller that drives the SSTL-2 signaling at 200 MHz with 3n CBR. The 4-bank architecture allows interleaved operations across banks while one bank is being precharged, improving effective bandwidth in streaming workloads. Self-refresh mode permits low-power standby retention, making the device suitable for battery-backed or low-duty-cycle embedded systems.
Typical applications for the W9425G6JH-5 include DDR1 main memory in industrial PCs, networking switches, digital video recorders, and printer controllers. The wide 16-bit bus simplifies interface to ASICs and low-cost processors without requiring multiple narrow-DRAM chips. Designers choose this Winbond part where Micron, Samsung, and Nanya equivalents are also qualified in 2018.
When designing with the W9425G6JH-5, place VTT termination resistors within 1 inch of the DQ/DQS pins and follow JEDEC DDR-I routing guidelines. Decouple VDDQ with 0.1uF and 10uF capacitors near each pin and route DQS in matched-length pairs with the byte lane.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an actionable single reference for sourcing and design-in of the W9425G6JH-5.
ドロップイン代替品: W9425G6JH-5 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
W9425G6JH-5I
✅ ドロップイン📋 参考代替品（カタログ未掲載）
W9425G6JH-4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MT46V16M16P-5B
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MT46V16M16TG-5BLAT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MT46V16M16P-5BL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
W9425G6JH-5 最大定格＆電気的特性
| メモリタイプ | DDR SDRAM (DDR1) |
| Density | 256 Mbit |
| メモリ構成 | 4M x 4 banks x 16 bits (16M x 16) |
| データバス幅 | 16 bits |
| Number of Words | 16,000 K (16M) |
| Number of Banks | 4 |
| Speed Grade | -5 (DDR400/CL3) |
| Max Data Rate | 400 Mwords/s |
| CASレイテンシ | CL3 (DDR400) |
| Supply Voltage (VDD) | 2.5 V +/- 0.2 V |
| Supply Voltage (VDDQ) | 2.5 V |
| I/O Interface | SSTL-2 |
| Burst Length | 2, 4, 8, full page |
| パッケージ | 66-pin TSOP-II (0.400 inch) |
| 動作温度 | -40C to +85C (-5I grade) |
| Refresh | Auto-refresh and self-refresh |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Unknown (legacy part, no verified RoHS statement) |
| ハロゲンフリー | Compliant (per cross-reference listing) |
| ECCN | EAR99 |
| Estimated EOL Date | Obsolete |
W9425G6JH-5 66-pin tsop-ii (0.400 inch) ピン配置ガイド
W9425G6JH-5 (66-pin tsop-ii (0.400 inch) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: W9425G6JH-5.
詳細は データシート をご参照ください。
主な用途
W9425G6JH-5 の用途: 7 件s: Industrial PC DDR1 Main Memory, Networking Switch and Router Line Cards, Set-Top Box and Digital TV Memory, Printer and MFP Controller Memory, Digital Video Recorder (DVR) Buffer, Legacy Industrial Controller Memory, Audio/Video Processing Equipment.
Industrial PC DDR1 Main Memory
The W9425G6JH-5's 16Mx16 x16 organization in a 66-pin TSOP-II package is ideal as main memory for industrial PCs and HMI panels that integrate legacy x86 or PowerPC DDR1 controllers. Its 256 Mbit density supports the typical 32 to 64 MB footprint required by Windows CE, VxWorks, and Linux embedded systems of the DDR1 era. The 2.5V VDD/VDDQ supply aligns directly with DDR1 host controllers, eliminating level shifters and reducing BOM cost. Placed in parallel to a single 16-bit DDR1 controller with VTT termination resistors within 1 inch of the DQ pins, it provides 400 Mwords/s peak bandwidth. The -5I grade extends operation to -40C to +85C, suiting outdoor and factory-floor deployments.
おすすめ
Networking Switch and Router Line Cards
The W9425G6JH-5's 4-bank architecture and DDR1 SSTL-2 interface make it well suited as packet-store memory on networking line cards, where multiple banks allow interleaved read/write of packet headers and payloads. The 400 Mwords/s bandwidth is sufficient for Fast Ethernet and early Gigabit forwarding engines using 16-bit DDR1 controllers. Its 2.5V supply fits standard DDR1 termination schemes using VTT = VDDQ/2. Placed adjacent to the switching ASIC with matched-length DQS/DQ routing, it delivers deterministic read latency. The 66-pin TSOP-II footprint is well-established in legacy networking hardware, enabling drop-in upgrades on existing PCBs.
おすすめ
Set-Top Box and Digital TV Memory
The W9425G6JH-5's 16Mx16 density is well matched to set-top box memory requirements, where the main SoC needs 32 to 64 MB of working memory for OS, video decode buffers, and OSD overlays. Its DDR1 bandwidth of 400 Mwords/s is sufficient for MPEG-2 decode and standard-definition video pipelines of the DDR1 era. The single 2.5V supply simplifies power-tree design in cost-sensitive consumer appliances. Placed on the same PCB as the main STB SoC with standard JEDEC DDR1 routing, it provides reliable operation. The commercial -5 grade (0C to +70C) is sufficient for indoor consumer environments.
おすすめ
Printer and MFP Controller Memory
Office printers and multifunction peripherals (MFPs) use DDR1 SDRAM as working memory for page buffers, font caches, and firmware execution. The W9425G6JH-5's 16Mx16 organization and 66-pin TSOP-II outline fit legacy printer-ASIC reference designs that require a single 16-bit DDR1 device per channel. The 400 Mwords/s bandwidth supports 600 dpi print engine data rates and JPEG compression pipelines. Its 2.5V supply is the JEDEC DDR1 standard, simplifying power sequencing in printer controllers. Placed adjacent to the printer SoC with proper VTT termination, it provides stable operation for high-duty-cycle office equipment.
おすすめ
Digital Video Recorder (DVR) Buffer
The W9425G6JH-5 functions as a frame buffer in entry-level DVR and surveillance recording systems, where 256 Mbit per device is sufficient to buffer several SD video streams. Its DDR1 interface delivers 400 Mwords/s, enough for simultaneous read/write of encoded video frames. The 4-bank architecture allows one bank to write fresh frames while another reads for encoding. Placed in parallel with a DDR1 controller ASIC, with VTT termination and matched DQ/DQS traces, it enables reliable multi-stream recording. The TSOP-II package is widely supported by DVR reference designs of the DDR1 generation.
おすすめ
Legacy Industrial Controller Memory
Long-lifecycle industrial controllers (PLCs, motor drives, machine-vision processors) use DDR1 SDRAM as main memory because of stable supply and well-characterized host ASICs. The W9425G6JH-5's 16Mx16 density suits 32 MB controller working memory, with the -5I grade qualified to -40C to +85C for factory-floor environments. Its 2.5V supply matches existing power trees, avoiding redesign of analog front-ends. Placed adjacent to the controller ASIC with matched DQ/DQS routing, it provides deterministic read/write timing. Drop-in compatibility with the Micron MT46V16M16 series enables dual-sourcing for multi-decade production commitments.
おすすめ
Audio/Video Processing Equipment
The W9425G6JH-5's DDR1 interface provides 400 Mwords/s bandwidth suited to audio/video processing equipment such as mixing consoles, video effects processors, and karaoke systems. Its 4-bank architecture supports simultaneous streaming of multiple audio channels or video overlays. The 66-pin TSOP-II package fits compact A/V processor PCBs where board area is constrained. Placed adjacent to DSP or audio ASICs with VTT termination, it delivers low-latency memory reads in real-time audio workflows. The commercial -5 grade suits indoor pro-AV equipment, while the -5I grade extends use to touring and outdoor installations.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: W9425G6JH-5 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | W9425G6JH-5I | W9425G6JH-4 | MT46V16M16P-5B | MT46V16M16TG-5BLAT | MT46V16M16P-5BL |
|---|---|---|---|---|---|---|
| Brand | Winbond | Winbond | Winbond | Micron Technology | Micron Technology | Micron Technology |
| Package | 66-pin TSOP-II | 66-pin TSOP-II - same | 66-pin TSOP-II - same | 66-pin TSOP-II - same | 66-pin TSOP-II - same | 66-pin TSOP-II - same |
| Density | 256 Mbit | 256 Mbit | 256 Mbit | 256 Mbit | 256 Mbit | 256 Mbit |
| Organization | 16M x 16 | 16M x 16 | 16M x 16 | 16M x 16 | 16M x 16 | 16M x 16 |
| Speed Grade | DDR400/CL3 (-5) | DDR400/CL3 (-5I) | DDR500/CL3/CL4 (-4) | DDR400/CL3 (-5B) | DDR400/CL3 | DDR400/CL3 (-5BL) |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Lifecycle Status | Obsolete | Obsolete (last time buy) | Obsolete | Obsolete / NRND | Obsolete / NRND | Obsolete / NRND |
主な差別化要因
- 16Mx16 single-chip x16 organization （vs MT46V16M16P-5B)
- Industrial -5I grade option （vs MT46V16M16P-5B (commercial only))
- DDR400/CL3 with optional -4 grade for DDR500 （vs MT46V16M16TG-5BLAT (DDR400 only))
設計ノート
Follow JEDEC DDR1 routing guidelines for the W9425G6JH-5: match DQ/DQS trace lengths within a byte lane to +/- 25 mil, route DQS as a differential pair, and place VTT termination resistors within 1 inch of the DQ/DQS pins. Provide a solid VSS and VSSQ plane directly under the TSOP-II footprint to control reference return paths. Keep DQ traces away from clocks and switching power nodes; cross only at 90 degrees if unavoidable. Use 0.1uF and 10uF decoupling capacitors on every VDD and VDDQ pin, placed as near to the pin as the layout allows. Estimated: based on the 66-pin TSOP-II 0.400 inch body width and 0.5 mm lead pitch typical for this package family.
The W9425G6JH-5 requires a clean 2.5V VDD supply with +/- 0.2V tolerance and a separate VDDQ rail terminated via SSTL-2 to VTT = VDDQ/2. Use a low-noise LDO or switching regulator with at least 100 mA headroom above worst-case burst current (approximately 200 mA per device for DDR400). Add bulk capacitance of 100uF near the regulator and 0.1uF + 10uF ceramic decoupling adjacent to every VDD/VDDQ pin. Power sequencing must satisfy tVDD = VDD stable before CK/CK# begins toggling, and VDDQ must not exceed VDD by more than 0.3V at any time to prevent latch-up.
Common pitfalls when designing with the W9425G6JH-5 include: omitting VTT termination (causes DDR timing violations), using a non-JEDEC DDR1 controller in SDR mode (the device is DDR only, not SDR), exceeding 4 consecutive refresh cycles without tRFC recovery (causes row corruption), and failing to init MRS (Mode Register Set) before the first read/write (host sees random data). Also ensure CK/CK# are properly crossed but not shorted, and verify the host controller supports 16Mx16 x16 organization with 4 banks. If unsure, run a DDR1 bring-up memory test pattern from the host ASIC vendor's reference design.
コンプライアンス情報
Cross-reference listing on GlobalSpec marks Halogen Free as Compliant. RoHS, REACH, lead-free, and conflict-minerals declarations are not in the verified web data and are marked unknown. AEC-Q100 is not applicable to commodity DRAM. The part is marked Obsolete / Estimated EOL by GlobalSpec.
